Ty, mktracy. I contacted AQ and they said "Unfortunately, you can’t use a splitter as each DBS unit needs its own circuit inside the cable." Not sure why they've changed their tune, but they don't wanna sell me a splitter for double 72V DBS packs. It's okay, I ended up purchasing a pair of Sky's that have the 72V DBS's with RF-noise traps. I was mainly wanting to upgrade for that, but figured I could repurpose the older 72V DBS packs to increase voltage on the dielectric simultaneously. I guess I should just be happy with 72V.
Thanks again for your response.